Have you ever wondered what makes "seventh heaven" and "cloud nine" so blissful and the number 13 so unlucky? Jamie Buchan offers the "4-1-1" on the origins of numerical expressions and the importance of numbers in fiction, film, culture, and religion, including how 007 became James Bond's number, how the binary system manages to say so much with only two numbers, and which block of Social Security numbers will never be assigned to anyone. Learn about imaginary numbers and how they can exist, why bedding has nothing to do with being "three sheets to the wind," and what made Ray Bradbury name his novel Fahrenheit 451.